Should Guns N' Roses be in the Rock N' Roll HOF? Hell yeah!
Will they actually be inducted? 50-50.
As has been hinted at in this thread... the HOF is run like the International Olympic Committee... and I'm just not convinced that GN'R will have the requisite PR army and will be unified enough amongst themselves to pursuade the voters that they should be in.
However, perhaps it's actually more Rock N' Roll NOT to be in the HOF. Maybe Guns N' Roses' better legacy is to be the bastard stepchild of rock... the band that had arguably more talent than any band in the HOF but was incapable of realizing it because of their own appetite for destruction.
Irregardless, Guns N' Roses is a legendary band and Axl and Slash are rock music icons that will be referenced and discussed for as long as people play rock music.